EP0756997B1 - Leicht zu öffnender Behälter mit richtungs-orientiertem Etikett-Abriss - Google Patents

Leicht zu öffnender Behälter mit richtungs-orientiertem Etikett-Abriss Download PDF

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Publication number
EP0756997B1
EP0756997B1 EP95305374A EP95305374A EP0756997B1 EP 0756997 B1 EP0756997 B1 EP 0756997B1 EP 95305374 A EP95305374 A EP 95305374A EP 95305374 A EP95305374 A EP 95305374A EP 0756997 B1 EP0756997 B1 EP 0756997B1
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EP
European Patent Office
Prior art keywords
layer
label layer
easy
tear
strip
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP95305374A
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English (en)
French (fr)
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EP0756997A1 (de
Inventor
Michael T. Drummond
Calvin G. Hill
Richard M. Lowman, Jr.
William C. Suski
Rodney W. Roberts
James W. Lowry
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Sonoco Products Co
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Sonoco Products Co
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Priority to DE69521505T priority Critical patent/DE69521505T2/de
Priority to EP95305374A priority patent/EP0756997B1/de
Publication of EP0756997A1 publication Critical patent/EP0756997A1/de
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Publication of EP0756997B1 publication Critical patent/EP0756997B1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31C—MAKING WOUND ARTICLES, e.g. WOUND TUBES, OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31C3/00—Making tubes or pipes by feeding obliquely to the winding mandrel centre line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
    • B65D3/26—Opening arrangements or devices incorporated in, or attached to, containers

Definitions

  • This invention relates to an easy-open container for packaging various products, particularly products under pressure such as biscuit and bread dough and the like. More specifically, this invention relates to an easy-open container having a spirally-wound bodywall layer forming an easy-open seam extending spirally between the ends of the container, an interior barrier liner layer, and an outer label layer, and being provided with means for directionally-orienting tearing of the label layer to remove at least that portion of the label layer which is in bridging relation to the easy-open spiral seam in the bodywall layer to allow opening of the container along such spiral seam.
  • these containers are formed of a spirally-wound paperboard or board stock bodywall layer and an interior liner layer for preventing leaking of the contents from the container.
  • the spirally-wound bodywall layer usually includes a butt joint formed by adjacent edges of the bodywall layer and which forms a spiral seam extending from one end of the container to the other end.
  • the exterior label layer surrounds the bodywall layer and covers or bridges the spiral seam to reinforce such seam and prevent premature opening along the spiral seam.
  • the outer label layer surrounding the spiral seam in containers of this type is an important structural component of the container because the outer label layer bridges the spiral seam and maintains it in closed position. Accordingly, in order to easy-open the container, that portion of the label layer which bridges the easy-open spiral seam of the bodywall layer must be stripped away to expose the spiral seam for easy-opening. Alternatively, the label layer may be totally peeled away from and removed from the bodywall layer of the container. This is desirable if a coupon or other advertising material is positioned under the label layer for removal by the purchaser of the container when opening of the container.
  • Various mechanisms have been provided to aid in such easy-opening including provision of a tear tab for starting the peeling or removal of the label layer so that the label layer may be torn toward a "collar cut" extending around the periphery of the label layer near one end of the container for completely removing the-label layer from the bodywall layer during easy-opening.
  • tear strips have been provided between the label layer and the bodywall layer in bridging relation to the easy-open spiral seam of the bodywall layer to act as a tearing medium for tearing away that portion of the label layer which bridges the easy-open spiral seam of the bodywall layer.
  • a paperboard bodywall layer in strip form is spirally-wound and defines a substantially cylindrical container having opposed ends.
  • the bodywall layer has longitudinal edges lying adjacent each other, preferably in abutting relationship, to define an easy-open spiral seam, preferably having a butt joint, extending between the opposed ends of the container.
  • a flexible barrier liner layer in strip form is spirally-wound inside the bodywall layer in superimposed position therewith.
  • a flexible label layer in strip form is spirally wound outside the bodywall layer in superimposed position therewith and has longitudinal edge portions overlapped with each other.
  • the label layer is positioned in bridging relation to the easy-open spiral seam.
  • a tab cut extends through the upper of the label layer edge portions and inwardly from the edge thereof to define a tear tab to be used in easy-opening of the container.
  • Means are provided for directionally-orienting tearing of the label layer to remove at least that portion of the label layer in bridging relation to the easy-open spiral seam to allow opening of the container along the spiral seam.
  • Such directionally-orienting tear means may include means incorporated directly in the label layer and extending generally transversely of the label layer strip in generally a cross-machine direction along with a desired type of bonding of the label layer to the bodywall layer of the container.
  • the directionally-orienting tear means may include a reinforcing and tear strip positioned on the inside of the upper of the overlapped label layer edge portions and in bridging relation to the easy-open spiral seam and having a directionally-orienting tear incorporated directly therein in a transverse or cross-machine direction along with high strength bonding means positioned between the reinforcing and tear strip and the upper label layer edge portion so that the label layer will tear with the tear strip for easy-opening of the container and other desired types of bonding between the label layer and the bodywall layer of the container.
  • the directionally-orienting tear means includes a low strength bonding means positioned between the label layer and the bodywall layer so that the label layer will peel and separate from the bodywall layer during removal of the label layer and/or reinforcing and tear strip from the easy-open spiral seam for opening of the container.
  • the directionally-orienting tear means includes a high strength bonding means positioned between the label layer and the bodywall layer so that the label layer will remain bonded to the bodywall layer and tear from the reinforcing and tear strip and the label layer edge portion bonded thereto during removal from the easy-open spiral seam.
  • an easy-open container which has means for directionally-orienting tearing of the label layer to remove either the entire label layer from the container or at least that portion of the label layer which bridges the easy-open spiral seam to allow opening of the container along the spiral seam.
  • the directionally-orienting tear feature will ensure that tearing of the label layer and/or the reinforcing and tear strip will occur as desired for accomplishing easy-opening of the container.
  • Figure 1 illustrates a modification to the embodiment of an easy-open container 10 illustrated in Figures 2-7 and will be described thereafter.
  • Figures 8-10 illustrate yet another preferred embodiment of a container 10 and will be described in detail below.
  • Figure 11 diagrammatically illustrates a preferred method and apparatus for forming a container 10 in accordance with this invention and will be described below.
  • the container 10 includes a generally cylindrical body portion 12 , a top end closure 14 and a bottom end closure 16 .
  • the container further includes a spirally-wound paperboard bodywall layer 17 in strip form which forms the basic shape of the cylindrical body portion 12 of the container 10 .
  • the bodywall layer 17 has longitudinal edges 17a lying adjacent each other, preferably in abutting relation, and defining an easy-open spiral seam 20 , preferably in the form of a butt joint, extending between the opposed ends of the body 12 and between the end closures 14 and 16 of the container 10.
  • This bodywall layer 17 may be advantageously composed of conventional spiral-winding paperboard or board stock having a thickness of between 0,25 cm (0.10) and about 0.9 cm (0.35 inch), preferably between about 0.4 cm (0.15) and (0.30 inch, for example 0,5 cm (0.021 inch).
  • Board stock conventionally used in the manufacture of spirally-wound containers is commercially available from various manufacturers including Sonoco Products Company, Republic Paperboard Corporation and Middletown Board Corporation.
  • the board stock typically is composed of kraft or recycled paper and can typically range from e.g. 22-45 kg/ream(480 sheet) (50 to 100 lbs./ream).
  • the board stock can include a weak exterior layer, e.g. a 0.07mm (0.003 inch)exterior news.
  • the easy-open container 10 further includes a flexible barrier liner layer 22 in strip form spirally-wound inside the bodywall layer 17 in superimposed position therewith and has overlapping longitudinal edge portions 22a in bridging relation to the spiral seam.
  • This liner layer 22 may advantageously be a barrier type, flexible sheet material, such as a polymer/foil, a kraft/foil/polymer, a polymer/polymer, or a kraft/foil laminate.
  • a high strength bonding means 23, preferably in the form of a permanent adhesive, may be positioned between the liner layer 22 and the bodywall layer 17.
  • An expandable fold or pleat 24 may be provided in the lower of the overlapping liner layer edge portions 22a and in bridging relation to the butt joint of the spiral seam 20 .
  • the overlapping liner layer edge portions 22a may be bonded by a low strength bonding means 30 , such as a heat seal.
  • the liner layer 22 prevents the escape of liquids, oils and, preferably, gases into and out of the container bodywall layer 17 from the interior of the container 10 and expands through the easy-open spiral seam 20 during opening of the container 10 , as will be described in more detail below.
  • the container 10 further includes a flexible label layer 25 in strip form spirally-wound outside the bodywall layer 17 in superimposed position therewith and having longitudinal edge portions 25a overlapped with each other.
  • the label layer 25 is positioned in bridging relation to the easy-open spiral seam 20 and in the embodiment of Figures 2-7, the overlapped label layer edge portions 25a are positioned in bridging relation to the easy-open spiral seam 20.
  • the label layer 25 is conventionally constructed from suitable materials, such as kraft paper, a polymer/foil laminate, a kraft paper/foil laminate, or the like.
  • the easy-open container 10 further includes a tab cut 27 extending through the upper overlapped label layer edge portion 25a and inwardly from the outer edge thereof to define a tear tab which may be easily lifted open and pulled by the user to initiate easy-opening of the container 10 in a manner to be described below.
  • means are provided for directionally-orienting tearing of the label layer 25 to ensure that the tearing of label layer 25 proceeds in the proper direction for removal of the desired portion thereof during easy-opening of the container 10.
  • This directionally-orienting tear means may take different forms and include different components of the container 10 and will be described with respect to each preferred embodiment of the container 10.
  • the directionally-orienting tear means includes the following.
  • a reinforcing and tear strip 28 is positioned between the overlapped label layer edge portions 25a and in bridging relation to the easy-open spiral seam 20 for reinforcement thereof.
  • a high strength bonding means 23, preferably in the form of a permanent adhesive, is positioned between the reinforcing and tear strip 28 and the upper label layer edge portion 25a so that the label layer 25 will tear with the tear strip 28 when easy-opening of the container 10.
  • Low strength bonding means 30 preferably in the form of a frangible adhesive, is positioned between the reinforcing and tear strip 28 and the lower label layer edge portion 25a so that the reinforcing and tear strip 28 will peel and separate from the lower label layer edge portion 25a during tearing and removal of the reinforcing and tear strip 28 from the easy-open spiral seam 20.
  • the directionally-orienting tear means further includes low strength bonding means 30 , preferably in the form of a frangible adhesive, positioned between the remainder of the label layer 25 and the bodywall layer 17 so that the remainder of the label layer 25 will peel and separate from the bodywall layer 17 during removal of the reinforcing and tear strip 28 from the easy-open spiral seam 20 for complete removal of the label layer 25 from the container 10 during easy-opening.
  • low strength bonding means 30 preferably in the form of a frangible adhesive
  • the directionally-orienting tear means further includes means incorporated directly in the reinforcing and tear strip 28 to orient tearing thereof in a transverse or cross-machine direction of such strip, as indicated by the arrows in Figures 2-4, so that tearing of the strip 28 will occur in a transverse direction and cause tearing of the label layer 25 also in that direction (as shown in Figure 2).
  • the tearing of the label layer 25 will continue in that direction to the upper end of the container 10 which has been closed by the closure 14 and will tear along the closure 14 circumferentially of the container 10 as the tear strip 28 is being peeled from the lowermost label layer edge portion 25a and downwardly along the spiral seam 20 (as shown in Figure 3) until the label layer 25 reaches the bottom of the container 10.
  • the tearing of the label layer 25 then continues circumferentially around the bottom of the container 10 along the closure 16 to remove the entire label layer 25 from the container 10 and expose the coupon for removal by the user (as shown in Figure 4).
  • the reinforcing and tear strip 28 may be formed from an oriented polymer film material, such as nylon, polypropylene, polyethylene terephthalate, etc.
  • the directionally-oriented tear means incorporated in the reinforcing and tear strip 28 may be formed by orienting the polymer film material during manufacture. This can be accomplished by squeezing the molten resin from an extruder through a linear coat hanger dye into a thin wide sheet that is cast onto a highly polished chill roll, cooled and wound into a roll. By drawing the film faster over a chill roll in one direction versus the other, an orientation is imparted to the film plane. The long molecular structure is weakly cross-linked.
  • This weaker, cross-linking fails easier than the long chain molecules, when force is applied, such as pulling during opening of the container 10.
  • a polymer film material manufactured using the above techniques will tear in the cross-machine or transverse direction significantly easier than in the machine or longitudinal direction.
  • the directionally-oriented tear means incorporated in the reinforcing and tear strip 28 may also be formed mechanically including laser or heating to form scores or other prestressing or by folding or the like to form stress lines.
  • this embodiment includes all of the above described elements and features of the container embodiment of Figures 2-7 except that the reinforcing and tear strip 28 is eliminated and is not part of the directionally-orienting tear means. Therefore, like reference characters are given for the same features in this embodiment.
  • the directionally-oriented tear means in this embodiment of container 10 of Figure 1 includes means incorporated directly in the label layer 25 itself and for orienting the tear thereof in generally a transverse direction of the label layer 25 and in generally a cross-machine direction of the label layer strip, as indicated by the arrows in Figure 1.
  • the directionally-orienting tear means for this embodiment of container 10 of Figure 1 could also include desired low strength bonding means, as described above so that the label layer 25 will tear in generally the same direction and will be removed from the container 10 in generally the same manner as described above in connection with the embodiment of container 10 of Figures 2-7.
  • the label layer 25 could be constructed of an oriented polymer film material as described above for the reinforcing and tear strip 28 laminated with other layers or materials, such as poly/poly, poly/kraft, poly/foil/poly, poly/foil/kraft, poly/metalized/poly, poly/metalized/kraft.
  • the directionally-oriented tear means incorporated in the label layer 25 could be formed in the same manner as described above for the reinforcing and tear strip 28 .
  • the directionally-orienting tear means to include a directionally-oriented tear feature incorporated directly in both a label layer 25 and in a reinforcing and tear strip 28 for an easy-open container 10 and these components could be constructed of the materials described above with the directionally-oriented tear in each as described above.
  • the upper label layer edge portion 25a and the reinforcing and tear strip 28 only are in bridging relation to the spiral seam 20 in the bodywall layer 17 and the directionally-orienting tear means also includes a low strength bonding means, preferably in the form of a frangible adhesive, positioned between the reinforcing and tear strip 28 and the bodywall layer 17 on either side of the spiral seam 20 so that the strip 28 will peel and separate from the bodywall layer 17 and away from the spiral seam 20 during tearing and removal of the tear strip 28 , and the upper label layer edge portion 25a bonded thereto in the manner described above.
  • a low strength bonding means preferably in the form of a frangible adhesive
  • the directionally-orienting tear means also includes a high strength bonding means 23 positioned between the remainder of the label layer 25a and the bodywall layer 17 so that the remainder of the label layer 25 will remain bonded to the bodywall layer 17 and tear from the reinforcing and tear strip 28 and the upper overlapped label layer edge portion 25a bonded thereto during removal thereof from the easy-open spiral seam 20 for exposing the spiral seam 20 during easy-opening of the container 10 (as shown in Figures 8 and 10).
  • the label layer 25 will tear at the spiral line at which it moves from superimposed position with the reinforcing and tear strip 28 to direct superimposed position with the label layer 17 .
  • the directionally-orienting tear means also includes means incorporated directly in the reinforcing and tear strip 28 for orienting tear thereof, like the embodiment of container 10 illustrated and described with respect to Figures 2-7, so that the reinforcing and tear strip and the label layer edge portion 25a bonded thereto will tear in a transverse direction across the tear strip 28 to the tear line described above for the remainder of the label layer 25 which is bonded by high strength bonding means 23 to the label layer 17 for removal of only that portion thereof which bridges the spiral seam 20 for easy-opening of spiral seam 20 and the container 10 .
  • the tear strip 28 and the directionally-oriented tear incorporated therein may be the same as that described above with respect to the embodiment of container 10 of Figures 2-7.
  • the tear or peel strength of this permanent adhesive will vary depending upon the materials used in the component layers of the container 10 .
  • the tear or peel strength must be greater than the tear strength of the liner layer 22 and the label layer 25 so that these layers will tear when the tear strip 28 is torn along the easy-open spiral seam. With current materials used for these component layers, it has been found that a peel strength greater than 2.20 lbs. per square inch is necessary.
  • the permanent adhesive may include polyvinyl alcohol with or without clay mix, blended or reactor resins, special additives, such as manufactured by H.B.
  • frangible adhesive forming the low strength bonding means 30 .
  • the tear or peel strength of this frangible adhesive will vary depending on the materials used in the component layers of the container 10. The peel strength must be weak or less than the tear strength of the liner layer 22 and the label layer 25 so that the layers will peel rather than tear. With current material used, it has been found that a peel strength of 0.42 to 1.99 pounds per square inch is preferred.
  • the frangible adhesive may include a high initial tack dextrine based adhesive commercially available from National Starch and Chemical Corporation, Grand Prairie, Texas as "71-5626B".
  • frangible adhesives which can be successfully used include heavily filled, resinous, aqueous emulsion type adhesives such as, for example polyvinylacetate dispersed in water together with a tackifying alcohol and an inert filler such as clay, silicon dioxide calcium carbonate, talc and the like.
  • the inert filler can insure that a weak discrete layer of adhesive remains between the superimposed components of the container to thereby provide for the fracture or breaking of the adhesive.
  • a release coating such as a microcrystalline wax, silicone or the like can be provided on the inner surface on either or both of the superimposed components of the container so that the adhesive layer is readily released upon drying.
  • frangible adhesive used for the low strength bonding means 30 have a high initial tack or adhesive so that the overlapped components between which it is positioned are held together during, and immediately following, manufacture of the container 10 . It is also important that this frangible adhesive be capable of readily allowing peeling or separating of the superimposed components between which it is positioned upon easy opening of the container 10 by tearing the tear strip 28 along the easy-open seam 20.
  • FIG 11 a preferred method and apparatus is diagrammatically illustrated and which is suitable for producing the easy-open container 10 of this invention and particularly the embodiments of Figures 2-7.and 8-10.
  • a flexible barrier liner layer 22 in strip form is provided from any suitable source of supply and is fed at a desired angle to a mandrel 52 of a suitable tube spiral winding machine for being spirally-wound on the mandrel 52 to form overlapping liner layer edge portions 22a in a manner well understood by those with ordinary skill in the art. While the liner layer 22 is being fed to the mandrel 52 , one of the longitudinal edge portions 22a thereof is folded over on itself by an edge folder 53 to form a pleat 24.
  • a heater device 54 heats the other longitudinal edge portion 22a of the liner layer 22 so that when these liner layer edge portions 22a are overlapped with each other, a low strength bonding means 30 in the form of a heat seal will be positioned between such overlapped liner layer edge portions 22a .
  • a paperboard bodywall layer 17 in strip form is provided from any suitable source of supply and is fed at a desired angle to the mandrel 52 for being spirally-wound onto the spirally-wound liner layer 22 on the mandrel 52 while positioning the longitudinal edges of the bodywall layer 17 in butt joint edge relationship to form a tube having a spiral seam 20 extending the length thereof in a manner well understood by those with ordinary skill in the art.
  • a permanent adhesive 23 is applied by a suitable adhesive applicator device 55 onto the top surface of the bodywall layer 17 to form a high strength bond between the bodywall layer 17 and the liner layer 22 when the bodywall layer 17 is spirally-wound onto the liner layer 22 on the mandrel 52.
  • a label layer 25 in strip form is provided from a suitable supply source and is fed at a desired angle to the mandrel 52 for spirally-winding thereof onto the outer surface of the tube formed by the spirally-wound bodywall layer 17 and liner layer 22 as such tube is moving forward on the mandrel 52 .
  • a reinforcing and tear strip 28 of narrower width than the label layer strip 25 and having a means incorporated therein for directionally-orienting tear in the transverse direction thereof is provided from a suitable supply source and is positioned in superimposed position under one outer longitudinal edge portion 25a of the label layer strip 25.
  • a permanent adhesive is applied by a suitable applicator device 56 along the upper surface of the strip 28 so that a high strength bond is formed between the strip 28 and the one outer label layer edge portion 25a when the strip 28 is superimposed thereunder.
  • a frangible adhesive for the embodiment of container 10 of Figures 2-7 or a permanent adhesive for the embodiment of container 10 of Figures 8-10 is applied to the remainder of the bottom surface of the label layer strip 25 which is not covered by the reinforcing and tear strip 28 by a suitable adhesive applicator device 58 to form a low strength bond or a high strength bond between the label layer 25 and the bodywall layer 17 when the label layer 25 is spirally-wound onto the bodywall layer 17 .
  • a frangible adhesive is applied by a suitable adhesive applicator device 59 to the bottom surface of the reinforcing and tear strip 28 for forming a low strength bond between the tear strip 28 and the other label layer longitudinal edge portion 25a when the label layer edge portions 25a are overlapped with each other during spiral-winding thereof.
  • a tab cut is formed by a suitable cutting mechanism 60 through the one outer label layer edge portion 25a and the reinforcing and tear strip 28.
  • this invention has provided an easy-open container for packaging various products, particularly products under pressure, and which provides means for directionally-orienting tearing of the label layer 25 to remove at least that portion of the label layer 25 in bridging relation to the easy-open spiral seam 20 of the bodywall layer 17 of the container 10 to allow opening of the container 10 along such spiral seam 20 .
  • a method has also been provided which may be utilized on conventional spiral-winding equipment without substantial modifications or new devices therein.

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Claims (15)

  1. Leicht zu öffnender Behälter (10), insbesondere ausgebildet zum Verpacken von Produkten unter Druck und umfassend: eine spiralförmig gewickelte Wandkörperschicht (17) aus Karton in Streifenform, die einen im Wesentlichen zylindrischen Behälter mit einander gegenüberliegenden Enden definiert, wobei die Wandkörperschicht Längsränder (17a) aufweist, die aneinander anliegen, wodurch ein leicht zu öffnender spiralförmiger Saum (20) gebildet wird, der sich zwischen den gegenüberliegenden Enden erstreckt; eine flexible Auskleidungssperrschicht (22) in Streifenform, die innerhalb der Wandkörperschicht diese überlagernd spiralförmig gewickelt ist; eine flexible Etikettenschicht (25) in Streifenform, die außerhalb der Wandkörperschicht diese überlagernd spiralförmig gewickelt ist und Längsrand-Abschnitte (25a) aufweist, die einander überlappen, wobei die Etikettenschicht mit dem leicht zu öffnenden spiralförmigen Saum in überbrückender Beziehung angeordnet ist; einen Laschenabschnitt (27), der sich durch den oberen der Etikettenschicht-Randabschnitte und von dessen Rand einwärts erstreckt, wodurch eine Zuglasche zum leichten Öffnen des Behälters definiert wird; sowie Mittel zum gerichteten Abreißen der Etikettenschicht, um zumindest den sich in überbrückender Beziehung mit dem leicht zu öffnenden spiralförmigen Saum befindlichen Abschnitt der Etikettenschicht zu entfernen, um das Öffnen des Behälters entlang des spiralförmigen Saums zuzulassen.
  2. Leicht zu öffnender Behälter nach Anspruch 1, worin das Mittel zum gerichteten Abreißen einen Verstärkungs- und Abreißstreifen (28) umfasst, der an der Innenseite des äußeren der überlappten Etikettenschicht-Randabschnitte angeordnet und in überbrückender Beziehung mit dem leicht zu öffnenden spiralförmigen Saum angeordnet ist, um diesen zu verstärken, und Mittel umfasst, die im Verstärkungs- und Abreißstreifen enthalten sind, und sich im Allgemeinen in Querrichtung dazu erstrecken, um das Abreißen des Streifens in Querrichtung auszurichten, sowie fest haftende Klebemittel, die zwischen dem Streifen und dem äußeren Etikettenschicht-Randabschnitt angeordnet sind, so dass die Etikettenschicht beim leichten Öffnen des Behälters mit dem Abreißstreifen abgerissen wird.
  3. Leicht zu öffnender Behälter nach einem der Ansprüche 1 oder 2, bei dem das Mittel zum gerichteten Abreißen Mittel umfasst, die in der Etikettenschicht enthalten sind und sich im Allgemeinen in Querrichtung zum Etikettenschicht-Streifen und im Allgemeinen quer zur Maschinenrichtung erstrecken, um das Abreißen der Etikettenschicht in diese Richtung auszurichten.
  4. Leicht zu öffnender Behälter nach Anspruch 2, worin das gerichtete Abreißmittel weiters ein schwach haftendes Klebemittel umfasst, das zwischen der Etikettenschicht und der Wandkörperschicht angeordnet ist, so dass sich die Etikettenschicht während des Entfernens des Verstärkungs- und Abreißstreifens vom leicht zu öffnenden spiralförmigen Saum abschält und abtrennt, um die Etikettenschicht während des leichten Öffnens vollständig vom Behälter zu entfernen.
  5. Leicht zu öffnender Behälter nach Anspruch 4, bei dem der äußere Etikettenschicht-Randabschnitt und der Verstärkungs- und Abreißstreifen den inneren Etikettenschicht-Randabschnitt überlappen und sich die überlappten Etikettenschicht-Randabschnitte und der Streifen in überbrückender Beziehung zum spiralförmigen Saum in der Wandkörperschicht befinden, und bei dem das richtungsbestimmende Abreißmittel weiters ein schwach haftendes Klebemittel umfasst, das zwischen dem Verstärkungs- und Abreißstreifen und dem inneren Etikettenschicht-Randabschnitt sowie zwischen dem inneren Etikettenschicht-Randabschnitt und der Wandkörperschicht angeordnet ist, so dass sich der Verstärkungs- und Abreißstreifen während des Entfernens des Verstärkungs- und Abreißstreifens vom leicht zu öffnenden spiralförmigen Saum abschält und trennt und sich dann während des vollständigen Entfernens der Etikettenschicht während des leichten Öffnens des Behälters der innere Etikettenschicht-Randabschnitt von der Wandkörperschicht und dem spiralförmigen Saum abschält und trennt.
  6. Leicht zu öffnender Behälter nach Anspruch 2, bei dem das fest haftende Klebemittel einen Permanentkleber umfasst.
  7. Leicht zu öffnender Behälter nach Anspruch 4, worin das schwach haftende Klebemittel einen ablösbaren Kleber umfasst.
  8. Leicht zu öffnender Behälter nach Anspruch 4, worin das fest haftende Klebemittel einen Permanentkleber umfasst und das schwach haftende Klebemittel einen ablösbaren Kleber umfasst.
  9. Verfahren zur Herstellung eines leicht zu öffnenden Behälters mit gerichtetem Abreißen, umfassend die Schritte des Bereitstellens einer flexiblen Auskleidungssperrschicht (22) in Streifenform, das Zuführen der Auskleidungsschicht zu einem Dorn (52), und das spiralförmige Aufwickeln der Auskleidungsschicht (22) auf den Dorn, um überlappende Auskleidungsschicht-Randabschnitte (22a) zu bilden; das Bereitstellen einer Wandkörperschicht (17) aus Karton in Streifenform, das Zuführen der Wandkörperschicht zum Dorn, und das spiralförmige Aufwickeln der Wandkörperschicht auf die spiralförmig gewickelte Auskleidungsschicht auf dem Dorn, wobei die Längsränder (17a) der Wandkörperschicht einen Stumpfstoß bilden, um eine Röhre mit einem spiralförmigen Saum (20) zu bilden, der sich ihre Länge entlang erstreckt; das Bereitstellen einer flexiblen Etikettenschicht (25) in Streifenform, bei der gerichtetes Abreißen inkorporiert ist, das in Querrichtung erfolgt, das Zuführen einer solchen Etikettenschicht zum Dorn und das spiralförmige Aufwickeln des überlagernden Etikettenschicht-Streifens auf die kontinuierliche Röhre auf dem Dorn, wobei die Längsränder des Etikettenschicht-Streifens einander überlappen, wobei die Etikettenschicht in überbrückender Beziehung zum spiralförmigen Saum in der spiralförmigen Wandkörperschicht angeordnet ist; sowie das Schneiden der so gewickelten Röhren in Behälterlängen.
  10. Verfahren nach Anspruch 9, worin die flexible Etikettenschicht einen Verstärkungs- und Abreißstreifen (28) umfasst, der eine geringere Breite als der EtikettenschichtStreifen aufweist, wobei für das gerichtete Abreißen gesorgt wird, indem ein fest haftendes Klebemittel auf eine nach außen gewandte Oberfläche des Verstärkungs- und Abreißstreifens aufgetragen wird und der Verstärkungs- und Abreißstreifen so angeordnet wird, dass er unter einem äußeren Längsrandabschnitt des Etikettenschicht-Streifens liegt, wobei sich das fest haftende Klebemittel dazwischen befindet, und ein schwach haftendes Klebemittel auf eine nach innen gewandte Fläche des Verstärkungs- und Abreißstreifens aufgetragen wird und der Verstärkungs- und Abreißstreifen und das schwach haftende Klebemittel in überbrückender Beziehung zum spiralförmigen Saum angeordnet werden.
  11. Verfahren zur Herstellung eines leicht zu öffnenden Behälters nach Anspruch 9 oder 10, weiters umfassend das Ausbilden eines Laschenabschnitts (27) durch den einen äußeren Etikettenschicht-Längsrandabschnitt und den Verstärkungs- und Abreißstreifen während des Zuführens der Etikettenschicht und des Verstärkungs- und Abreißstreifens zum Dorn.
  12. Verfahren zur Herstellung eines leicht zu öffnenden Behälters nach Anspruch 10 oder 11, weiters umfassend das Auftragen eines schwach haftenden Klebemittels auf die nach innen gewandte Oberfläche der Etikettenschicht, die nicht mit dem Verstärkungs- und Abreißstreifen bedeckt ist, während des Zuführens der Etikettenschicht und des Verstärkungs- und Abreißstreifens zum Dorn.
  13. Verfahren zur Herstellung eines leicht zu öffnenden Behälters nach Anspruch 12, bei dem der Schritt des Auftragens eines schwach haftenden Klebemittels das Auftragen eines ablösbaren Klebers umfasst, und bei dem der Schritt des Auftragens eines stark haftenden Klebemittels das Auftragen eines Permanentklebers umfasst.
  14. Verfahren zur Herstellung eines leicht zu öffnenden Behälters nach Anspruch 10 oder 11, weiters umfassend das Auftragen eines fest haftenden Klebemittel auf den Abschnitt der Etikettenschicht, der nicht vom Verstärkungs- und Abreißstreifen bedeckt ist, während des Zuführens der Etikettenschicht und des Verstärkungs- und Abreißstreifens zum Dorn.
  15. Verfahren zur Herstellung eines leicht zu öffnenden Behälters nach Anspruch 14, bei dem der Schritt des Auftragens eines stark haftenden Klebemittels das Auftragen eines Permanentklebers umfasst, und bei dem der Schritt des Auftragens eines schwach haftenden Klebemittels das Auftragen eines lösbaren Klebers umfasst.
EP95305374A 1995-08-01 1995-08-01 Leicht zu öffnender Behälter mit richtungs-orientiertem Etikett-Abriss Expired - Lifetime EP0756997B1 (de)

Priority Applications (2)

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DE69521505T DE69521505T2 (de) 1995-08-01 1995-08-01 Leicht zu öffnender Behälter mit richtungs-orientiertem Etikett-Abriss
EP95305374A EP0756997B1 (de) 1995-08-01 1995-08-01 Leicht zu öffnender Behälter mit richtungs-orientiertem Etikett-Abriss

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EP95305374A EP0756997B1 (de) 1995-08-01 1995-08-01 Leicht zu öffnender Behälter mit richtungs-orientiertem Etikett-Abriss

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US6152355A (en) * 1999-02-12 2000-11-28 Sonoco Development, Inc. Tubular container with raised panel design

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Publication number Priority date Publication date Assignee Title
US3174676A (en) * 1963-09-30 1965-03-23 Cleveland Container Corp Container
US3940496A (en) * 1973-08-13 1976-02-24 The Pillsbury Company Spiral wound can having discrete label and reinforcing elements
US3981433A (en) 1975-09-15 1976-09-21 Boise Cascade Corporation One-step easy-open container for refrigerated dough products and the like
US4257316A (en) * 1978-09-20 1981-03-24 Boise Cascade Corporation Method for pre-cutting labels for composite containers

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DE69521505D1 (de) 2001-08-02
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